IC tag and inlet for IC tag

Abstract

An IC tag mounting at least two IC chips operating in different frequency bands. The IC tag having a first inlet including a first antenna having a relatively long operation wavelength and a first IC chip mounted on the first antenna, and a second inlet including a second antenna having an operation wavelength shorter than the first antenna and disposed crossing at a predetermined angle over a line of the first antenna without positioning both opposite ends of the second antenna upon the first antenna and a second IC chip mounted on the second antenna. The second antenna has a matching circuit for impedance matching between the second antenna and the second IC chip. The matching circuit is a slit formed in the second antenna and positioned upon terminals of the second IC chip. Thus, the second antenna is made compact using the first antenna as an auxiliary antenna.

1. An IC tag mounting at least two IC chips operating in different frequency bands, comprising:
 a first inlet including a first antenna having a relatively long operation wavelength and a first IC chip mounted on said first antenna; and 
 a second inlet including a second antenna having an operation wavelength shorter than said first antenna and disposed crossing at a predetermined angle over a line of said first antenna without positioning both opposite ends of said second antenna upon said first antenna and a second IC chip mounted on said second antenna, 
 wherein said second antenna has a matching circuit for impedance matching between the second antenna and said second IC chip, and 
 wherein said matching circuit is a slit formed in said second antenna and positioned upon terminals of said second IC chip. 
 
     
     
       2. The IC tag according to  claim 1 , wherein said predetermined angle is a right angle. 
     
     
       3. The IC tag according to  claim 1 , wherein said first antenna and said second antenna are inductively coupled via an insulator. 
     
     
       4. The IC tag according to  claim 3 , wherein said insulator is made of resin, resin foam or paper. 
     
     
       5. The IC tag according to  claim 3 , wherein said insulator is made of pressure sensitive adhesive or adhesive for bonding said first and second inlets. 
     
     
       6. The IC tag according to  claim 3 , wherein said insulator is a lamination structure of one of resin, resin foam and paper, and pressure sensitive adhesive or adhesive. 
     
     
       7. The IC tag according to  claim 3 , wherein a thickness of said insulator is 0.01 mm or thicker. 
     
     
       8. The IC tag according to  claim 1 , wherein said first inlet is accommodated in outer package material of resin constituting the IC tag, and said second inlet is attached on a top or bottom surface of said outer package material. 
     
     
       9. The IC tag according to  claim 8 , wherein said outer package material is one of polyethyleneterephthalate (PET), glycol denatured copolymer PET resin (PET-G), and vinyl chloride. 
     
     
       10. An IC tag mounting at least two IC chips operating in different frequency bands, comprising:
 a first inlet including a first antenna having a relatively long operation wavelength and a first IC chip mounted on said first antenna; and 
 a second inlet including a second antenna having an operation wavelength shorter than said first antenna and disposed crossing at a predetermined angle over a line of said first antenna without positioning both opposite ends of said second antenna upon said first antenna and a second IC chip mounted on said second antenna, 
 wherein a length of said second antenna is 0.2λ or shorter where λ is the operation wavelength of said second antenna. 
 
     
     
       11. An IC tag mounting at least two IC chips operating in different frequency bands, comprising:
 a first inlet including a first antenna having a relatively long operation wavelength and a first IC chip mounted on said first antenna; and 
 a second inlet including a second antenna having an operation wavelength shorter than said first antenna and disposed crossing at a predetermined angle over a line of said first antenna without positioning both opposite ends of said second antenna upon said first antenna and a second IC chip mounted on said second antenna, 
 wherein said an operation frequency of said first antenna is 13.56 MHz and an operation frequency of said second antenna is 2.45 GHz.